Add initial project structure with core functionality for book and stationery uploads

- Created main application entry point in `main.go`.
- Added configuration management in `config/config.go` and tests in `config/config_test.go`.
- Implemented handlers for book and stationery uploads in `handlers/book.go` and `handlers/stationery.go`, including validation logic.
- Established database connection and services in `services/database.go` and `services/book_service.go`.
- Defined models for books and stationery in `models/book.go` and `models/stationery.go`.
- Set up Firebase integration for image uploads in `services/firebase.go`.
- Created migration scripts for database schema in `migrations/001_create_tables.sql` and subsequent updates.
- Added CORS and error handling middleware.
- Included comprehensive tests for handlers, services, and utilities.
- Documented API endpoints and usage in `README.md` and migration instructions in `migrations/README.md`.
- Introduced `.gitignore` to exclude unnecessary files and directories.
- Added Go module support with `go.mod` and `go.sum` files.
- Implemented utility functions for slug generation and validation in `utils/slug.go` and `utils/validation.go`.

models/book.go

@@ -0,0 +1,33 @@
+package models
+
+import "time"
+
+// Book represents a book product in the database
+type Book struct {
+	BookCode        string    `json:"book_code" db:"book_code"`
+	BookName        string    `json:"book_name" db:"book_name"`
+	Cost            float64   `json:"cost" db:"cost"`
+	Price           float64   `json:"price" db:"price"`
+	Discount        float64   `json:"discount" db:"discount"`
+	Quantity        int       `json:"quantity" db:"quantity"`
+	PublisherAuthor string    `json:"publisher_author" db:"publisher_author"`
+	Category        string    `json:"category" db:"category"`
+	Description     string    `json:"description" db:"description"`
+	ImageURL        string    `json:"image_url" db:"image_url"`
+	Slug            string    `json:"slug" db:"slug"`
+	CreatedAt       time.Time `json:"created_at" db:"created_at"`
+	UpdatedAt       time.Time `json:"updated_at" db:"updated_at"`
+}
+
+// BookCreateRequest represents the data needed to create a new book
+type BookCreateRequest struct {
+	BookName        string  `json:"book_name"`
+	Cost            float64 `json:"cost"`
+	Price           float64 `json:"price"`
+	Discount        float64 `json:"discount"`
+	Quantity        int     `json:"quantity"`
+	PublisherAuthor string  `json:"publisher_author"`
+	Category        string  `json:"category"`
+	Description     string  `json:"description"`
+	ImageURL        string  `json:"image_url"`
+}

models/stationery.go

@@ -0,0 +1,37 @@
+package models
+
+import "time"
+
+// Stationery represents a stationery product in the database
+type Stationery struct {
+	StationeryCode string    `json:"stationery_code" db:"stationery_code"`
+	StationeryName string    `json:"stationery_name" db:"stationery_name"`
+	Cost           float64   `json:"cost" db:"cost"`
+	Price          float64   `json:"price" db:"price"`
+	Discount       float64   `json:"discount" db:"discount"`
+	Quantity       int       `json:"quantity" db:"quantity"`
+	Color          string    `json:"color" db:"color"`
+	Material       string    `json:"material" db:"material"`
+	Dimensions     string    `json:"dimensions" db:"dimensions"`
+	Category       string    `json:"category" db:"category"`
+	Description    string    `json:"description" db:"description"`
+	ImageURL       string    `json:"image_url" db:"image_url"`
+	Slug           string    `json:"slug" db:"slug"`
+	CreatedAt      time.Time `json:"created_at" db:"created_at"`
+	UpdatedAt      time.Time `json:"updated_at" db:"updated_at"`
+}
+
+// StationeryCreateRequest represents the data needed to create a new stationery item
+type StationeryCreateRequest struct {
+	StationeryName string  `json:"stationery_name"`
+	Cost           float64 `json:"cost"`
+	Price          float64 `json:"price"`
+	Discount       float64 `json:"discount"`
+	Quantity       int     `json:"quantity"`
+	Color          string  `json:"color"`
+	Material       string  `json:"material"`
+	Dimensions     string  `json:"dimensions"`
+	Category       string  `json:"category"`
+	Description    string  `json:"description"`
+	ImageURL       string  `json:"image_url"`
+}